CN103159443B - Ultrahigh-strength concrete and preparation method thereof - Google Patents

Ultrahigh-strength concrete and preparation method thereof Download PDF

Info

Publication number
CN103159443B
CN103159443B CN201310080997.1A CN201310080997A CN103159443B CN 103159443 B CN103159443 B CN 103159443B CN 201310080997 A CN201310080997 A CN 201310080997A CN 103159443 B CN103159443 B CN 103159443B
Authority
CN
China
Prior art keywords
parts
equal
less
strength concrete
ultra
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201310080997.1A
Other languages
Chinese (zh)
Other versions
CN103159443A (en
Inventor
程宝军
黄波
杨文�
邓宵
刘小琴
刘通
贾丽莉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHINA CONSTRUCTION COMMERCIAL CONCRETE Co Ltd
Original Assignee
CHINA CONSTRUCTION COMMERCIAL CONCRETE Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHINA CONSTRUCTION COMMERCIAL CONCRETE Co Ltd filed Critical CHINA CONSTRUCTION COMMERCIAL CONCRETE Co Ltd
Priority to CN201310080997.1A priority Critical patent/CN103159443B/en
Publication of CN103159443A publication Critical patent/CN103159443A/en
Application granted granted Critical
Publication of CN103159443B publication Critical patent/CN103159443B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses ultrahigh-strength concrete which comprises the following components in parts by weight: 300-350 parts of cement, 270-315 parts of composite mineral admixture, 30-35 parts of composite expanding agent, 96-112 parts of water, 680-720 parts of river sand, 1012-1080 parts of gravel, 13.2-14.0 parts of polycarboxylic acid high-efficiency water reducing agent, 4.4-4.7 parts of plastic retaining agent and 0.18-0.21 part of defoaming agent, wherein the composite mineral admixture is prepared from 42-49 parts of ore powder, 150-175 parts of fly ash, 30-35 parts of silica fume, 18-21 parts of zeolite powder and 30-35 parts of wollastonite powder. The invention is characterized in that the 60d concrete compression strength is 140-160 MPa, the 60d splitting tensile strength is 9.2-10.2 MPa, extruded concrete can achieve self-compaction effect within 3 hours, and the 14d self-shrinkage value is less than 0.05%.

Description

A kind of ultra high strength concrete and preparation method thereof
Technical field
The invention belongs to building material technical field, be specifically related to a kind of ultra high strength concrete and preparation method thereof.
Background technology
In recent years, high-strength one of trend into modern concrete technical development that changes into.The research of high-strength concrete, development have obtained larger progress, and the intensity of high-strength concrete improves gradually, and performance is constantly perfect, and are widely applied in a lot of fields.But along with building structure complicated, high-rise building is increasing, high-strength concrete cannot meet construction needs, super high strength concrete will become the main trend of concrete development.Countries in the world all start super high strength concrete to carry out theoretical investigation and engineering application.
Super high strength concrete is a kind of good structured material, it has high intensity and good endurance quality, can effectively lower dead load, increase building usage space, and compared to other materials, there is lower cost, along with the development of China's high-rise building, for the demand of super high strength concrete also in growth progressively.Along with modern architecture is towards high stratification, large span, lightweight, ruthless area development (cold district, varieties in saline-alkali areas) is also more and more higher to the requirement of concrete strength, therefore carries out development high-strength high-performance concrete and has important practical significance.
Although super high strength concrete exists more advantage, due to self-characteristic, also there are some inferior positions; On the one hand, owing to having adopted a large amount of ultra-fine active mineral admixtures and extremely low water-cement ratio in superpower Concrete process, cause the contraction of super high strength concrete large, can reach more than 10/10000ths, and mostly occur in length of time morning, cause its early stage cracking probability higher compared with normal concrete; On the other hand, concrete is along with ultimate compression strength improves constantly, and its fragility increases gradually, and this has restricted the application of super high strength concrete in engineering to a certain extent.
Summary of the invention
Technical problem to be solved by this invention is the deficiency existing for above-mentioned prior art and a kind of ultra high strength concrete and preparation method thereof is provided, and it has the feature of ultimate compression strength superelevation, the more high and low contraction of tensile pressure ratio, self-compacting.
A kind of ultra high strength concrete, meter by weight, it comprises following starting material: 300 ~ 350 parts of cement, 270 ~ 315 parts of complex mineral blending materials, 30 ~ 35 parts of composite expanding agents, 96 ~ 112 parts, water, 680 ~ 720 parts, river sand, 1012 ~ 1080 parts of rubbles, 13.2 ~ 14.0 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.4 ~ 4.7 parts of plasticity-retention agents, 0.18 ~ 0.21 part of defoamer; Described complex mineral blending material is made up of 30 ~ 35 parts of 42 ~ 49 parts of breezes, 150 ~ 175 parts, flyash, 30 ~ 35 parts of silicon ashes, 18 ~ 21 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 12 ~ 14 parts of 18 ~ 21 parts of light calcined magnesias, calcium oxide.
Press such scheme, described cement is that strength grade is more than or equal to 42.5 ordinary Portland cement, and its vigorous formula specific surface is more than or equal to 350m 2/ kg;
Press such scheme, described breeze is the mixture of any one or two kinds of arbitrary proportions in S95, S105, and its vigorous formula specific surface area is more than or equal to 400m 2/ kg; The vigorous formula specific surface area of described flyash is more than or equal to 600m 2/ kg, needs water ratio to be less than or equal to 95%, and loss on ignition is less than or equal to 5%; SiO in silicon ash 2mass content is more than or equal to 90%, and nitrogen adsorption specific surface area is more than or equal to 100000m 2/ kg; Nitrogen adsorption specific surface area>=the 700m of described zeolite powder 2/ kg, inhales ammonium value and is more than or equal to 100mmmol/100g, and water demand ratio is less than or equal to 115%, and the mass content of silicon-dioxide is more than or equal to 65%; Described wollastonite powder is needle-like pattern, and length-to-diameter ratio is more than or equal to 15, and its fineness is 200 mesh sieves, tails over massfraction and is less than or equal to 5%.
Press such scheme, the vigorous formula surface-area of described light calcined magnesia and calcium oxide is more than or equal to respectively 400m 2/ kg.
Press such scheme, described river sand is thick river sand in being, fineness modulus is 2.6 ~ 3.0, and silt content is less than or equal to 1.5%(mass content).
Press such scheme, described rubble is limestone gravel or basaltic broken stone, and rubble grade is 5 ~ 20mm or 5 ~ 16mm continuous grading, and faller gill shape granular mass content is less than or equal to 5%, and crush values is less than or equal to 6%.
Press such scheme, the solid content of described high-efficiency water-reducing agent of poly-carboxylic acid is more than or equal to 25%(mass content), water-reducing rate is more than or equal to 30%, alkali content is less than or equal to 0.2%(mass content).
Press such scheme, described plasticity-retention agent main component is Sunmorl N 60S, is pale yellow powder shape, and virtual mass content is greater than 98%, and reduzate quality content is less than 0.9%, and water ratio is less than 0.3% (mass content).
In such scheme, described defoamer is organic silicon modified by polyether.
The preparation method of above-mentioned ultra high strength concrete, it comprises the following steps:
(1) first use the fully wetting stirrer of sand-cement slurry of the water-cement ratio identical with super high strength concrete and contain concrete container;
(2) weigh in proportion the each starting material of concrete, 300 ~ 350 parts of cement, 270 ~ 315 parts of complex mineral blending materials, 30 ~ 35 parts of composite expanding agents, 96 ~ 112 parts, water, 680 ~ 720 parts, river sand, 1012 ~ 1080 parts of rubbles, 13.2 ~ 14.0 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.4 ~ 4.7 parts of plasticity-retention agents, 0.18 ~ 0.21 part of defoamer; Described complex mineral blending material is made up of 30 ~ 35 parts of 42 ~ 49 parts of breezes, 150 ~ 175 parts, flyash, 30 ~ 35 parts of silicon ashes, 18 ~ 21 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 12 ~ 14 parts of 18 ~ 21 parts of light calcined magnesias, calcium oxide;
(3) successively load weighted rubble, cement, complex mineral blending material, composite expanding agent, river sand are joined in stirrer, build stirrer, stir 60 ~ 100 seconds, it is uniformly mixed, obtain compound;
(4) load weighted defoamer, plasticity-retention agent and high-efficiency water-reducing agent of poly-carboxylic acid are added to water, stir the several seconds with glass stick, obtain uniform aqua;
(5) open stirring cover, while stirring aqua is slowly joined in compound, stir 180 ~ 240 seconds, can obtain ultra high strength concrete.
Compared with prior art, beneficial effect of the present invention is as follows:
First, super high strength concrete 60d ultimate compression strength of the present invention is that 140 ~ 160MPa(sample dimensions is 100mm × 100mm × 100mm cube specimen), 60d tensile splitting strength is that 9.2 ~ 10.2MPa(sample dimensions is 150mm × 150mm × 150mm cube specimen); And there is good serviceability, do not emanate, bleeding not, concrete mix slump divergence 700 ± 50mm, rewinding time 4 ~ 8s; Concrete T 50 test periods≤10s, concrete goes out in machine 3h can reach self-compacting effect, U-shaped case difference of altitude≤20mm.
The second, super high strength concrete of the present invention is due to the optimization of concrete gel material component and the admixture of suitable volume light calcined magnesia swelling agent, and super high strength concrete 14d self-constriction is less than 5/10000ths.
Superfined flyash and silicon ash particle good sphericity, particle diameter is tiny, there is the effect of good filling effect, active function and mineral water-reducing agent, the present invention is by optimizing both mix ratios, significantly improve the packing density of ultra high strength concrete glue material system, effectively reduce concrete water-cement ratio, improve concrete serviceability and mechanical property.
Light calcined magnesia aquation water requirement is few, and has Delaying expansion, the volumetric shrinkage that can compensate long-age time, concrete produces; Calcium oxide aquation is very fast, and can compensate concrete self-constriction in early stage and temperature drop and shrink, and the Ca (OH) generating 2can excite the activity of mineral admixture, promote the carrying out of secondary pozzolanic reaction; The present invention is by optimizing both mix ratios, and light calcined magnesia and calcium oxide play better synergy in super high strength concrete, and expansion character is stable, expands and concrete contraction and intensity cooperative development.
Zeolite powder has higher activity and is vesicular structure, under the selected suitable volume of the present invention, has improved concrete later strength with higher activity; Meanwhile, zeolite powder has played the effect of storage reservoir in concrete, is conducive to improve inside concrete relative humidity, has reduced the self-constriction of super high strength concrete.
Wollastonite powder, as a kind of mineral fibre, by controlling it as raw-material proportioning, has improved the fragility problem of super high strength concrete, has significantly improved concrete tensile splitting strength; Sunmorl N 60S can guarantee to possess good serviceability in concrete 3h as plasticity-retention agent, and serviceability loss is little; Polyether Modified Polysiloxanes Defoaming Agent, effectively suppresses and has eliminated super high strength concrete harmful air pocket in the mix process.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
embodiment 1:
A kind of ultra high strength concrete, meter by weight, it comprises 300 parts of following component: PO 42.5 cement, 270 parts of complex mineral blending materials, 30 parts of composite expanding agents, 96 parts, water, 720 parts, river sand, 1080 parts of 5 ~ 20mm limestone gravels, 13.2 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.4 parts of plasticity-retention agents, 0.18 part of defoamer; Described complex mineral blending material is made up of 30 parts of 42 parts of S95 breezes, 150 parts, flyash, 30 parts of silicon ashes, 18 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 12 parts of 18 parts of light calcined magnesias, calcium oxide.
The preparation method of above-mentioned ultra high strength concrete, it comprises the following steps:
(1) first use the fully wetting stirrer of sand-cement slurry of the water-cement ratio identical with super high strength concrete (according to 96 parts, water in raw material, 300 parts of PO 42.5 cement calculate, and water-cement ratio is 96:300) and contain concrete container;
(2) weigh according to the above ratio the each starting material of concrete;
(3) successively load weighted rubble, cement, complex mineral blending material, composite expanding agent, river sand are joined in stirrer, build stirrer, stir 60 ~ 100 seconds, it is uniformly mixed, obtain compound;
(4) load weighted defoamer, plasticity-retention agent and high-efficiency water-reducing agent of poly-carboxylic acid are added to water, stir the several seconds with glass stick, obtain uniform aqua;
(5) open stirring cover, while stirring aqua is slowly joined in compound, stir 180 ~ 240 seconds, can obtain ultra high strength concrete, the ultra high strength concrete of 60d ultimate compression strength 142.4MPa, 60d tensile splitting strength 9.2MPa, 14d self-constriction 4.2/10000ths.
implementation column 2:
A kind of ultra high strength concrete, meter by weight, it comprise 325 parts of following component: PO 42.5 cement, 292.5 parts of complex mineral blending materials, 32.5 parts of composite expanding agents, 104 parts, water, in 700 parts, thick river sand, 1042 parts of 5 ~ 20mm limestone gravels, 13.7 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.5 parts of plasticity-retention agents, 0.2 part of defoamer; Described complex mineral blending material is made up of 32.5 parts of 45.5 parts of S95 breezes, 162.5 parts, flyash, 32.5 parts of silicon ashes, 19.5 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 13 parts of 19.5 parts of light calcined magnesias, calcium oxide.
After feeding, through according to technique described in embodiment 1, can make the ultra high strength concrete of 60d ultimate compression strength 150.6MPa, 60d tensile splitting strength 9.7MPa, 14d self-constriction 4.5/10000ths.
embodiment 3:
A kind of ultra high strength concrete, meter by weight, it comprise 350 parts of following component: PO 42.5 cement, 315 parts of complex mineral blending materials, 35 parts of composite expanding agents, 104 parts, water, in 700 parts, thick river sand, 1042 parts of 5 ~ 20mm limestone gravels, 13.7 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.5 parts of plasticity-retention agents, 0.2 part of defoamer; Described complex mineral blending material is made up of 35 parts of 45.5 parts of S95 breezes, 175 parts, flyash, 32.5 parts of silicon ashes, 21 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 14 parts of 21 parts of light calcined magnesias, calcium oxide.
After feeding, through according to technique described in embodiment 1, can make the ultra high strength concrete of 60d ultimate compression strength 162.5MPa, 60d tensile splitting strength 10.2MPa, 14d self-constriction 4.8/10000ths.
embodiment 4:
A kind of ultra high strength concrete, meter by weight, it comprises following starting material: 320 parts of cement, 315 parts of complex mineral blending materials, 35 parts of composite expanding agents, 112 parts, water, 680 parts, river sand, 1012 parts of rubbles, 14.0 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.7 parts of plasticity-retention agents, 0.21 part of defoamer; Described complex mineral blending material is made up of 35 parts of 49 parts of breezes, 175 parts, flyash, 35 parts of silicon ashes, 21 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 14 parts of 21 parts of light calcined magnesias, calcium oxide.
Described cement is that strength grade is more than or equal to 42.5 ordinary Portland cement, and its vigorous formula specific surface is more than or equal to 350m 2/ kg;
Described breeze is S95, and its vigorous formula specific surface area is more than or equal to 400m 2/ kg; The vigorous formula specific surface area of described flyash is more than or equal to 600m 2/ kg, needs water ratio to be less than or equal to 95%, and loss on ignition is less than or equal to 5%; SiO in silicon ash 2mass content is more than or equal to 90%, and nitrogen adsorption specific surface area is more than or equal to 100000m 2/ kg; Nitrogen adsorption specific surface area>=the 700m of described zeolite powder 2/ kg, inhales ammonium value and is more than or equal to 100mmmol/100g, and water demand ratio is less than or equal to 115%, and the mass content of silicon-dioxide is more than or equal to 65%; Described wollastonite powder is needle-like pattern, and length-to-diameter ratio is more than or equal to 15, and its fineness is 200 mesh sieves, tails over massfraction and is less than or equal to 5%.
The vigorous formula surface-area of described light calcined magnesia and calcium oxide is more than or equal to respectively 400m 2/ kg.
Described river sand is thick river sand in being, fineness modulus is 2.6 ~ 3.0, and silt content is less than or equal to 1.5%(mass content).
Described rubble is basaltic broken stone, and rubble grade is 5 ~ 20mm or 5 ~ 16mm continuous grading, and faller gill shape granular mass content is less than or equal to 5%, and crush values is less than or equal to 6%.
The solid content of described high-efficiency water-reducing agent of poly-carboxylic acid is more than or equal to 25%(mass content), water-reducing rate is more than or equal to 30%, alkali content is less than or equal to 0.2%(mass content).
Described plasticity-retention agent main component is Sunmorl N 60S, is pale yellow powder shape, and virtual mass content is greater than 98%, and reduzate quality content is less than 0.9%, and water ratio is less than 0.3% (mass content).
Described defoamer is organic silicon modified by polyether.
After feeding, through according to technique described in embodiment 1, can make the ultra high strength concrete of 60d ultimate compression strength 155.3MPa, 60d tensile splitting strength 10.1MPa, 14d self-constriction 4.6/10000ths.
The ultra high strength concrete that above-described embodiment 1 ~ 4 is made makes a service test, shown in test data table 1.
As seen from the above table, super high-strength low-shrinkage self-compacting concrete of the present invention, sample dimensions is that the 60d ultimate compression strength of 100mm × 100mm × 100mm cube specimen is within the scope of 140 ~ 160MPa; Concrete 14d self-shrinking value is less than 5/10000ths; It is good that concrete goes out machine serviceability, in 3h, can keep self-compacting effect.

Claims (7)

1. a ultra high strength concrete, it is characterized in that counting by weight, it comprises following starting material: 300 ~ 350 parts of cement, 270 ~ 315 parts of complex mineral blending materials, 30 ~ 35 parts of composite expanding agents, 96 ~ 112 parts, water, 680 ~ 720 parts, river sand, 1012 ~ 1080 parts of rubbles, 13.2 ~ 14.0 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 4.4 ~ 4.7 parts of plasticity-retention agents, 0.18 ~ 0.21 part of defoamer; Described complex mineral blending material is made up of 30 ~ 35 parts of 42 ~ 49 parts of breezes, 150 ~ 175 parts, flyash, 30 ~ 35 parts of silicon ashes, 18 ~ 21 parts of zeolite powders, wollastonite powder; Described composite expanding agent is made up of 12 ~ 14 parts of 18 ~ 21 parts of light calcined magnesias, calcium oxide;
Described breeze is the mixture of any one or two kinds of arbitrary proportions in S95, S105, and its vigorous formula specific surface area is more than or equal to 400m 2/ kg; The vigorous formula specific surface area of described flyash is more than or equal to 600m 2/ kg, water demand ratio is less than or equal to 95%, and loss on ignition is less than or equal to 5%; SiO in described silicon ash 2mass content is more than or equal to 90%, and nitrogen adsorption specific surface area is more than or equal to 100000m 2/ kg; Nitrogen adsorption specific surface area>=the 700m of described zeolite powder 2/ kg, inhales ammonium value and is more than or equal to 100mmol/100g, and water demand ratio is less than or equal to 115%, and the mass content of silicon-dioxide is more than or equal to 65%; Described wollastonite powder is needle-like pattern, and length-to-diameter ratio is more than or equal to 15, and its fineness is 200 mesh sieves, tails over massfraction and is less than or equal to 5%.
2. a kind of ultra high strength concrete according to claim 1, is characterized in that described cement is that strength grade is more than or equal to 42.5 ordinary Portland cement, and its vigorous formula specific surface area is more than or equal to 350m 2/ kg.
3. a kind of ultra high strength concrete according to claim 1, is characterized in that the vigorous formula specific surface area of described light calcined magnesia and calcium oxide is more than or equal to respectively 400m 2/ kg.
4. a kind of ultra high strength concrete according to claim 1, it is characterized in that described river sand be in thick river sand, fineness modulus is 2.6 ~ 3.0, silt content is less than or equal to 1.5%, silt content is in mass content.
5. a kind of ultra high strength concrete according to claim 1, is characterized in that described rubble is limestone gravel or basaltic broken stone, and grade is 5 ~ 20mm or 5 ~ 16mm continuous grading, and faller gill shape granular mass content is less than or equal to 5%, and crush values is less than or equal to 6%.
6. a kind of ultra high strength concrete according to claim 1, the solid content that it is characterized in that described high-efficiency water-reducing agent of poly-carboxylic acid is more than or equal to 25%, water-reducing rate is more than or equal to 30%, and alkali content is less than or equal to 0.2%, and wherein solid content and alkali content are all in mass content.
7. a kind of ultra high strength concrete according to claim 1, it is characterized in that described plasticity-retention agent main component is Sunmorl N 60S, is pale yellow powder shape, and virtual mass content is greater than 98%, reduzate quality content is less than 0.9%, is less than 0.3% in mass content water ratio.
CN201310080997.1A 2013-03-14 2013-03-14 Ultrahigh-strength concrete and preparation method thereof Active CN103159443B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310080997.1A CN103159443B (en) 2013-03-14 2013-03-14 Ultrahigh-strength concrete and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310080997.1A CN103159443B (en) 2013-03-14 2013-03-14 Ultrahigh-strength concrete and preparation method thereof

Publications (2)

Publication Number Publication Date
CN103159443A CN103159443A (en) 2013-06-19
CN103159443B true CN103159443B (en) 2014-10-08

Family

ID=48583017

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310080997.1A Active CN103159443B (en) 2013-03-14 2013-03-14 Ultrahigh-strength concrete and preparation method thereof

Country Status (1)

Country Link
CN (1) CN103159443B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103304206A (en) * 2013-06-28 2013-09-18 深圳大学 Ultrahigh-strength self-compacting concrete and preparation method thereof
CN103387361A (en) * 2013-08-04 2013-11-13 中国建筑第四工程局有限公司 Preparation method of three-low three-high low-carbon environmentally-friendly concrete for super high-rise buildings
CN104072037B (en) * 2014-05-29 2016-02-10 蚌埠华东石膏有限公司 A kind of carbon nanotubes concrete and preparation method thereof
CN105503054A (en) * 2015-12-24 2016-04-20 邢台建工商品混凝土有限公司 Ultrahigh-strength concrete with ultrahigh pumping performance and preparation method of ultrahigh-strength concrete
CN106116385A (en) * 2016-06-28 2016-11-16 蚌埠市方阵商品混凝土有限公司 A kind of strong concrete
CN106380127B (en) * 2016-08-19 2019-01-11 碳元科技股份有限公司 A kind of high heat dissipation concrete material
CN106517932A (en) * 2016-10-13 2017-03-22 浙江长兴恒基科技有限公司 Anticorrosion and antirust reinforced concrete, and microcirculation construction production method thereof
CN106746994A (en) * 2016-12-19 2017-05-31 芜湖浩权建筑工程有限公司 A kind of superhigh intensity building concrete and preparation method thereof
CN106927736A (en) * 2017-03-02 2017-07-07 福州外语外贸学院 A kind of high-strength environment-friendly concrete and preparation method thereof
CN108439940A (en) * 2018-05-14 2018-08-24 盐城市凯利特商品混凝土有限公司 A kind of Lu Jianyong environment-friendly concretes and preparation method thereof
CN108929082A (en) * 2018-07-05 2018-12-04 清华大学 A kind of lower shrinkage super high strength concrete
CN108658547A (en) * 2018-08-09 2018-10-16 平乡县世恒新型建材有限公司 Self-compacting concrete
CN109503068A (en) * 2018-11-19 2019-03-22 中建科技有限公司 Low frequency vibration compacting, expansive concrete and preparation method thereof
CN109608142A (en) * 2019-02-12 2019-04-12 陕西盛泰浩景建材有限公司 A kind of C35 concrete and preparation method thereof
CN110066123B (en) * 2019-04-30 2020-11-17 镇江苏博特新材料有限公司 Method for preparing light magnesium oxide and calcium oxide and application of light magnesium oxide and calcium oxide in preparation of calcium-magnesium composite expanding agent
CN110066127A (en) * 2019-04-30 2019-07-30 镇江苏博特新材料有限公司 A kind of ultra-long and ultra-thick structural concrete calcium and magnesium composite expanding agent and preparation method thereof
CN110108561B (en) * 2019-05-24 2020-06-12 四川大学 Method for obtaining aggregate-mortar bonding strength change condition in concrete
CN110156402A (en) * 2019-06-04 2019-08-23 江南大学 A kind of cement base new-old concrete interfacial adhesion strengthening material and preparation method
CN111646753A (en) * 2020-06-18 2020-09-11 湖北合力久盛混凝土有限公司 Preparation method of C80 machine-made sand concrete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1305441A (en) * 1998-05-14 2001-07-25 布伊格斯公司 Concrete comprising organic fibres dispersed in cement matrix, concrete cement matrix and premixes
CN102503229A (en) * 2011-10-21 2012-06-20 中国铁道科学研究院铁道建筑研究所 Special modifying agent for self-compacting concrete of high speed railway ballastless track

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1305441A (en) * 1998-05-14 2001-07-25 布伊格斯公司 Concrete comprising organic fibres dispersed in cement matrix, concrete cement matrix and premixes
CN102503229A (en) * 2011-10-21 2012-06-20 中国铁道科学研究院铁道建筑研究所 Special modifying agent for self-compacting concrete of high speed railway ballastless track

Also Published As

Publication number Publication date
CN103159443A (en) 2013-06-19

Similar Documents

Publication Publication Date Title
Zhang et al. A review on properties of fresh and hardened geopolymer mortar
CN105272027B (en) A kind of compression strength 300MPa above ultra-high performance concretes and preparation method thereof
Wang et al. The role of fly ash microsphere in the microstructure and macroscopic properties of high-strength concrete
Oltulu et al. Single and combined effects of nano-SiO2, nano-Al2O3 and nano-Fe2O3 powders on compressive strength and capillary permeability of cement mortar containing silica fume
Chindaprasirt et al. High-strength geopolymer using fine high-calcium fly ash
Rajamma et al. Alkali activation of biomass fly ash–metakaolin blends
Madandoust et al. Mechanical properties of concrete containing waste glass powder and rice husk ash
Nazari et al. The effects of SiO2 nanoparticles on physical and mechanical properties of high strength compacting concrete
CN102992722B (en) Ultrahigh-strength grouting material based on iron tailing sand and cement and preparation method of grouting material
KR101838757B1 (en) High or ultra-high performance concrete
CN104402345B (en) A kind of big micro-swollen high-strength grout of fluidised form
Dembovska et al. Effect of pozzolanic additives on the strength development of high performance concrete
Nazari et al. Influence of Al2O3 nanoparticles on the compressive strength and workability of blended concrete
CN105060793B (en) A kind of high-titanium dry slag sand C50 self-compacting micro-expanded steel tube concretes and preparation method thereof
CN101328029B (en) Preparation of manganese slag groundmass geopolymer cementing material
Tadayon et al. Influence of nano-silica particles on mechanical properties and permeability of concrete
CN101323515B (en) Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same
Bendapudi et al. Contribution of fly ash to the properties of mortar and concrete
CN109020399A (en) A kind of C140 high-strength concrete and preparation method thereof
CN103896527A (en) Lightweight high-strength cement based composite material
WO2017067411A1 (en) Self-compacting concrete for use as crts iii slab ballastless railway track filler layer and method for preparation thereof
CN101781109B (en) Light-weight dry-mixed masonry mortar
US9353008B2 (en) Structural lightweight concrete or mortar, method for manufacturing same and use thereof as self-placing concrete
Nazari et al. The effects of Cr2O3 nanoparticles on strength assessments and water permeability of concrete in different curing media
CN100506738C (en) Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model